The evolution of the network structure in tin-fluoro-phosphate glass with increasing temperature

The interfacial interaction between tin-fluoride-phosphate glass (TFP-glass) and polar polymers is enhanced with increasing temperature, however, the mechanism is still unclear. In this work, the evolution of the network structure in TFP-glass with increasing temperature is investigated to explore the plausible mechanism. The dissociation of the network structure in TFP-glass, which can be observed in all TFP-glass samples synthesized at different conditions, is believed to be the reason for the temperature-dependency of the interfacial interaction. The mechanism for the dissociation has been thoroughly investigated via two-dimensional infrared spectroscopy (2D-IR), dynamic rheological analysis and XRD. The almost disappeared dissociation of TFP-glass extracted from Poly (ethylene terephthalate) (PET)/TFP-glass composite validates our inference. The conclusion would help us to deeply understand the interfacial interaction in polar polymer/TFP-glass composites and ultimately provide a guideline for the preparation of polar polymer/TFP-glass composites with strong interfacial interaction.